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4V 1.5A Rechargeable sealed lead acid battery pack of 1pcs

4V 1.5A Rechargeable sealed lead acid battery pack of 1pcs

ComponentSpecification
ChemistrySealed Lead Acid (SLA)
Nominal Voltage4.0V
Capacity1.5Ah (1500mAh)
Full Charge Voltage4.5V – 4.7V
Terminal TypeSolder Tabs / Flat Leads
Housing MaterialHigh-Impact ABS Plastic
                                 Price

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₹ 59.32 ₹ 59.32
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Barcode: 3146

Product Description The 4V 1.5Ah Sealed Lead Acid battery is a high-density, maintenance-free power source designed for small-to-midsize portable electronics. Providing a significant 1500mAh capacity in a compact footprint, this battery is the standard replacement for high-power rechargeable LED searchlights, emergency lamps, and small motorized hobby projects. Its valve-regulated, spill-proof construction ensures safe operation in any orientation, making it a rugged and reliable choice for field-use equipment and DIY prototypes.

Key Features

  • Optimized Capacity: 1.5Ah rating offers a superior balance between runtime and portable weight.

  • Maintenance-Free: Completely sealed design requires no electrolyte top-ups throughout its lifespan.

  • Stable 4V Rail: Delivers a steady voltage discharge, ideal for high-brightness white LEDs and 3V-5V logic circuits.

  • Rugged Construction: Impact-resistant ABS casing protects internal lead plates from physical shocks and vibration.

  • Low Self-Discharge: Engineered to retain charge effectively during long periods of storage compared to Ni-Cd alternatives.

Technical Details

  • Dimensions: Approx. 35mm x 22mm x 70mm (Standard 4V 1.5Ah footprint)

  • Standard Charge Current: 150mA (0.1C)

  • Max Charge Voltage: 4.8V

  • Cycle Life: 200–400 Charge/Discharge cycles

  • Operating Temperature: -10°C to +50°C

  • Weight: Approx. 130g to 160g

Prototyping and Engineering Tips from Robogears

  • Charging Guidance: To ensure maximum battery health, avoid using unregulated high-voltage adapters. A constant current charge of 150mA is recommended until the voltage reaches 4.5V–4.6V. For automated charging, a simple LM317-based voltage regulator circuit set to 4.6V works effectively.

  • Driving 3.3V Electronics: A 4V SLA battery is an excellent power source for 3.3V microcontrollers (like the ESP8266 or Raspberry Pi Pico). Use a Low-Dropout (LDO) regulator like the AMS1117-3.3 to convert the 4V (which can be up to 4.7V when full) into a rock-steady 3.3V.

  • LED Efficiency: This battery is perfect for driving arrays of 0.5W LEDs. Since the battery voltage is close to the LED forward voltage, very little energy is wasted as heat through the current-limiting resistors, allowing for longer runtimes.

  • Storage Maintenance: Lead-acid batteries should never be stored at 0% charge. If your project is going into storage, charge the battery to 100% first. A "deeply discharged" SLA battery left for months may develop "sulfation," rendering it unable to take a charge again.

Package Includes

  • 1 x 4V 1.5Ah Sealed Lead Acid (SLA) Rechargeable Battery

Disclaimer Images are for reference; actual dimensions or casing color may vary slightly by batch. Specifications subject to change by manufacturer. This product contains lead; please dispose of it responsibly at an authorized recycling center.

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